The entire show industry has ABSOLUTELY nothing to do with the real world commercial or for that matter the niche industry in any type of livestock period.

You may need to revise your statement because most all dairy show heifers end up in the milking herd producing milk just like the real world commercial cows.
In fact, the Junior 2-yr-old that was 2024 Reserve Intermediate Champion of the Midwest Fall National Dairy Show was a cow pulled from the milking herd, no special feed ration, just another cow that caught the eye when they were figuring out what to show this year.